OP,
Since you're in ECE, are you talking about setting up a PS3/PK4 only program like AppleTree? As I'm sure you know (although maybe not all DCUMers), there is a huge need for high quality early childhood programs in in high poverty neighborhoods. The same areas where DCPS is closing schools. And of course everyone can benefit from health/wellness.
But have you considered creating a nonprofit service provider that could work with multiple schools? You could create curriculum, run PD or offer afterschool programs that serve students and their families. Without having to deal with the hassle of DC-CAS, facilities, and other things that would take time and energy away from your core expertise.
Foundations may be more interested in funding a scalable, replicable program that avoids the politics of charters vs. DCPS in facilities, funding etc. Being a service provider avoids the competition for enrollment, outside funding, and space with more established and growth oriented charters like KIPP.
Have you checked out Education Strengthens Families charter at Mary's Center in Adams Morgan?
http://www.dcpubliccharter.com/data/files/Schools/60/053-ESF_AP11-12.pdf It's primarily for low-income, young parents and their children. The center provides comprehensive medical treatment and the school focuses on literacy for children and adults. But it doesn't appear that they have a specifically healthy eating or IB academic program.
AppleTree, ESF, and Inspired Teaching charter schools all grew out of nonprofits that built up expertise and scale in their core competence. That model may be aligned with your idea and mission more than Yu Ying.
Best of luck